.LTZ File Extension
File TypeCompressed Poser Light Set File
What is an LTZ file?
Compressed lighting information file used by Poser, a 3D character modeling and animation program; includes light data, such as spotlights and distant lights; Poser 6 and later may also contain point lights and image-based lights.
Uncompressed Poser light set files use the .LT2 extension.